package com.suddev.common;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * Created by zd on 2017/5/14 0014.
 */
public class TokenCache {
    private static Logger logger= LoggerFactory.getLogger(TokenCache.class);

    public static String TOKEN_PREFIX = "token_";

    //LRU算法
    private static LoadingCache<String,String> loadingCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12,TimeUnit.HOURS)
            .build(new CacheLoader<String, String>() {
                //默认数据加载实现，当调用get取值的时候，如果没有对应的key值，就用这个方法加载。
                @Override
                public String load(String s) throws Exception {
                    return "null";
                }
            });

    public static void setKey(String key,String value){
            loadingCache.put(key,value);
    }

    public static String getKey(String key){
        String value = null;
        try{
            value = loadingCache.get(key);
            if ("null".equals(value)){
                return null;
            }
            return value;
        }catch (Exception e){
            logger.error("localCache get error",e);
        }
        return null;
    }
}
